[sdiy] Crossfade circuit for CVs?

[jorgen.bergfors at idg.se]

>If it doesn't need to be fast, build a "pot" from two Vactrols.

Thanks for the tip Jürgen. I had thought of Vactrols, and your
implementation indeed looks good.
But eventhough this is a low parts count solution, it isn't necessarily a
cheap solution.
The circuit I'm going to contol with this, already contains 12 Vactrols, so
I'm not so keen on adding 24 more Vactrols. But If there is no cheaper
solution, I might do it anyway.

/Jörgen